It melts at 3727 C. The stable form of carbon at room temperature is Graphite which has a hexagonal crystal structure. (Top diagram) Diamond is metastable at room temperature and has a diamond cubic ...

The defining feature of this diamond is its hexagonal crystal lattice, distinct from the usual cubic structure seen in natural diamonds. Scientists had suspected for decades that a hexagonal ...

Silicon has the diamond cubic crystal structure with a lattice parameter of 0.543 nm. The nearest neighbor distance is 0.235 nm. The diamond cubic crystal structure has an fcc lattice with a basis of ...